Re: Solaris 10 shmmax

The box I have installed were Sun Blades, with four AMD Opteron Dual Core
CPUs and 8GB Memory.

Mark if shmmax does not matter I dont understand why it is a requirement in
Oracle 10gR2 Installation Guide ....

On 3/26/07, Bobak, Mark <Mark.Bobak_at_il.proquest.com> wrote:
>> Does it really matter if your shared memory is in one chunk or not? I> seem to remember a bit of misinformation that used to float around was that> if the SGA was not in a single shared memory chunk, then ISM was disabled.> Turns out that isn't true. I can't think of any reason why it would be> important for the SGA to be in one contiguous memory chunk.>>> -Mark>>> *--*> *Mark J. Bobak*> *Senior Oracle Architect*> *ProQuest/CSA*>> "There are 10 types of people in the world: Those who understand binary,> and those who don't.">>> ------------------------------> *From:* oracle-l-bounce_at_freelists.org [mailto:> oracle-l-bounce_at_freelists.org] *On Behalf Of *Kevin Closson> *Sent:* Monday, March 26, 2007 1:09 PM> *To:* Hameed, Amir; ax.mount_at_GMAIL.COM; oracle-l_at_freelists.org> *Subject:* RE: Solaris 10 shmmax>> The 490 is a flat memory box and the Solaris port is smart enough to> behave correctly.>>>> On the other hand, I have a lab server( Sun v490) running 10.2.0.2 on> Solaris9. The shmmax is set to 20GB. My SGA is 12GB and I am seeing only one> segment from ipcs. I have not tinkered with the NUMA optimization parameter.> Per Metalink note 39926.1, multiple shared memory segments in 10gR2 are> there for performance reason. Why is the behaviors of shared memory segments> in 10gR2 is different on the same platform (v490 versus 6900)?>>>>>>